Closer look at fracking

February 9, 2015

Brennan Linsley/AP

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A worker watches over a hydraulic fracturing operation at an Encana Corp. gas well pad, near Mead, Colo. In the background is a tall canvas wall around the perimeter of the extraction site, which mitigates noise, light and dust coming from the operation during the drilling and completion phase, which generally takes a few weeks.

Brennan Linsley/AP

15of29

A worker watches over a hydraulic fracturing operation at an Encana Corp. gas well pad, near Mead, Colo. In the background is a tall canvas wall around the perimeter of the extraction site, which mitigates noise, light and dust coming from the operation during the drilling and completion phase, which generally takes a few weeks.